Leaving the Oden's reincarnation out of the way...
I like Kidd's robot more and more. It might not be the most effective thing against Kaido, but it's still fucking awesome.
Killer's attack looks like some kind of weird ass "sonic projection" that makes his blades seem bigger, but it's actually waves, so that's why it can "pierce" Kaido? Some kind of "ghost blade". Kinda cool, actually.
Law didnt do anything that we havent seen already, gonna wait until he uses some new tricks.
Luffy purely tanking the fire breath with "guts" was cool. He wasn't unscathed, but took it like a champ.